public static MyMatrix operator *(MyMatrix firstMatrix, MyMatrix secondMatrix)
        {
            if (firstMatrix.Height != secondMatrix.Width)
            {
                throw new ArgumentException("The number of first matrix columns unequal to the number of second matrix rows");
            }

            MyMatrix result = new MyMatrix(firstMatrix.Height, secondMatrix.Width);

            for (int row = 0; row < firstMatrix.Height; row++)
            {
                for (int column = 0; column < secondMatrix.Width; column++)
                {
                    for (int k = 0; k < firstMatrix.Width; k++)
                    {
                        result[row, column] += firstMatrix[row, k] * secondMatrix[k, column];
                    }
                }
            }
            return(result);
        }
 public MyMatrix(MyMatrix matrixToCopy) : this(matrixToCopy.Matrix.Clone() as double[, ])
 {
 }